Calculate the degrees of freedom

Assignment Help Basic Statistics

Reference no: EM132176822

Assignment -

1. Instructions: Questions 1-2 refer to the following observed data:

A gambler interested in increasing his understanding of the odds associated with a standard deck of playing cards conducts the following experiment. Using a standard deck of 52 cards, he randomly "cuts" the deck twenty times and records the suit of the top card. The resulting distribution is as follows:

Clubs	3
Diamonds	11
Hearts	0
Spades	6

Q1. Calculate the degrees of freedom.

Df=k-1

Df= 4-1= 3

Q2. Calculate the chi-square.

2. Instructions: Questions 3-7 refer to the following situation:

Below are the results of a cross-tabulation regarding the relationship between location of residence and an individual's fear of being a victim of a violent crime:

Residence	Very Afraid	Somewhat Afraid	Not Afraid
Rural	10	35	55
Urban	60	25	15

Q3. What is the null hypothesis?

Q4. What are the degrees of freedom?

Q5. What is the critical chi-square value given in Table F of Appendix C for the .05 significance level?

Q6. Compute the chi-square value.

Q7. Is there a significant difference between residence locations and an individual's fear of crime? What is the level of significance?

3. Instructions: Questions 8-12 refer to the following situation:

A standardized test is used to measure the aggression (ranging from 0 - 300) of individuals from two groups. The following results were found:

Group 1 - 104, 109, 127, 143, 187, 204, 209, 266, 277

Group 2 - 62, 82, 89, 90, 101, 106, 109, 109, 205

Q8. Find the median of the two samples combined.

Q9. Conduct a median test to determine if there is a significant difference between these groups.

Q10. "Is there a significant difference between the two groups and level of aggression? If so, what is the level of significance?"

Q11. "Using the same data, conduct a Mann-Whitney U test of significance."

Q12. "Is there a significant difference between the two groups and level of aggression? If so, what is the level of significance?"

Reference no: EM132176822

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